The Index includes the top large cap, mid cap and small cap stocks, representing about 85 percent of the U.S. equity market.

The S&P 1500 index is calculated by Standard & Poor's and is reconstituted as needed basis by S&P economists, index experts, and members of the S&P Index Committee. In 2005, Standard & Poor's developed sub indices to the S&P 1500 Index. The S&P 1500 sub-indices are part of the S&P U.S. Style series. The S&P 1500 sub-indices are listed as S&P Composite 1500/Citigroup growth and value indices.[1]